中枢神经系统-脊髓.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Position and External Features,II.,Internal Structure of Spinal Cord,III.,Reflex and Injury of Spinal Cord,.,position and,external features,1、位置,2、外形,颈膨大,Cervical enlargement,腰骶膨大,Lumbosacral enlargement,脊髓圆锥,Conus medullaris,终丝,filum terminale,前正中裂,anterior median fissure,后正中沟,posterior median sulcus,前外侧沟,anterolateral sulcus,后外侧沟,posterolateral sulcus,3.,Vertebral Levels of Spinal Cord,Segments,Nerve nucleus of spinal cord and Rexed lamina model(脊髓神经核和Rexed分层模式,),Grey matter lamina of spinal cord and corresponding structures脊髓灰质分层的对应关系,板层,板层,板层,板层,板层,板层,板层,板层,板层,板层,对应的核,(或者部位),后角边缘核,胶状质,后角固有核,后角颈部,后角基底部,中间带(背核,中间内,外侧核),前角底部,前角内侧核和外侧核,中央灰质,上行纤维传导束（感觉传导束）,（1）薄束,fasciculus gracilis,楔束,fasciculus cuneatus,位置：后索,起于：脊神经节,止于：薄束核和楔束核,功能：传导同侧肌、腱、关节,的本体感觉和皮肤的精,细触觉。,2.,White matter of,spinal cord,1.Ascending Pathways,:,（2）,Spinocerebellar tract,脊髓小脑束,脊髓小脑后束,Posterior spinocerebellar tract,位置：外侧周边后半部,起于：胸核（同侧为主）,止于：小脑皮质,脊髓小脑前束,Anterior spinocerebellar tract,位置：外侧周边前半部,起于：-板层外侧部,止于：小脑皮质,功能：此二束传递下肢,和躯干下部的深,感觉和外感觉信,息至小脑,（3）,Spinothalamic tract,脊髓丘脑束,脊髓丘脑侧束,lateral spinothalamic tract,脊髓丘脑前束,anterior spinothalamic tract,位置：外侧索的前半部和前索前根内侧,起于：对侧灰质、-板层,止于：丘脑腹后外侧核,功能：传递痛、温觉和粗触、压觉,Descending Pathways:,下行纤维传导束,（运动传导束）,皮质脊髓侧束,lateral,corticospinal,tract,皮质脊髓前束,anterior,corticospinal,tract,Barne,前外侧束,anterolateral,tract of,Barne,（1）皮质脊髓束,corticospinal tract,（2）网状脊髓束,Reticulospinal tract,位置：前索和外侧索的前内侧部,起于：脑桥和延髓网状结构,止于：、板层,功能：参与对躯干和肢体近端肌,运动的调控,（3）红核脊髓束,Rubrospinal tract,位置：外侧索,起于：中脑红核,止于：-板层,功能：兴奋屈肌运动神经元,（4）前庭脊髓束,Vestibulospinal tract,（5）内侧纵束,Medial longitudinal fasciculus,III.,Reflex and Injury of Spinal Cord,Reflex of Spinal Cord,(,1,),.,牵张反射,stretch reflex,深反射,deep reflex,肌张力反射,muscle tension reflex,屈曲反射,flectional reflex,2.Injury of Spinal Cord,1.脊髓完全横断 3.脊髓前角受损,2.脊髓半横断 4.中央灰质周围病变,Thanks!,